Tilting fire-grate.



2 SHEETS-SHEET l.

l mr M1 l A. CARSWELL. TILTING HRB GRATE. APPLICATION FILED AUG. 8, 1907.

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Mw @Mm 2 SHEETS-SHEET 2.

A. GRSWELL. ILTING FIRE GRAT APPLICATIQN FILED AUG. s. 1907.

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TILTING FIRE-GRATE.

Specification of Letters Iatent;

Patented Dec. 3, 1907.

Application nea August s. 1907. serai No. 887.689.

To all whom imag Be it known that 1,- ALEXANDER CARS- -WnLL, a citizen. of the United States, residing at Chicago, in the county of Cook and; State of Illinois, have invented certain new and useful Improvements in Tilting Fire-Grates, of which the following is a specification.

This invention is particularly applicable for use in connection with gas generators, although it may be employed in other furnace structures in which it is desirable to provide means for quickly discharging and cleaning the grate surfaces.

The object of the invention is to provide a grate surface formed, in sections or divisions, each adapted to be independently operated to discharge toward its'wn individual outlet, and further to provide a supporting wall structure of suitable form to permit ready distribution of the blast beneath the grate surface.

The invention relates to the structure as a whole and the individual parts thereof and to the features of construction and combination of parts hereinafter described and claimed.- l,

ln the drawings, Figure `1 isa top or plan view of the grate portion of a gas generator; Fig. 2 a sectional elevation taken online 2 2 of F ig. 1; Fig. 3 a plan view similar to Fig. 1

with the grate bars removed; and Fig. 4 a cross sectional View taken on line 4-4 of Fig. 1.

The furnace structure 5 is of the usual cy- 3'5li1fidrical formation and is provided with four The doors or outlets, 6, two on each side.

' door openings are of inwardly divergent formation, and the doors of each pair on lthe dsame side of the generator are separated by means of a section of wall 7 of segmental shape, which gives to the inner walls of the door openings a convergent formation. The door openings, 'on their outer sides,- are bounded by straight sections of wall 8, in parallel relation with one another, so that the outer sides of the doors are parallel with the cross diameter of the generator structure.

The interior of the generator structure is divided by a continuous cross wall 9 which extends between the straight walls 8, and the continuous cross wall 9 is supplemented by sectional cross walls 10 set at right angles to the center of the cross wall.9, which arrangement gives a cross shape to the wall structure, as shown in Fig. 3. Each of the cross walls'is of hollow arch formation, and the walls are provided with blast openin s 11, the walls beine open at thevbottom an provided, alon ttiieir lower edges, with flanges 12, upon w ich restmetallic floor sections 13, the outer edges 14 of which are embedded tor structure. This arrangement provides a blast chamber 15 below the flooring 13. and in communication with the arch shaped cross walls, so that the blast of air delivered to the blast chamber Will be equally distribfrom the openings thereof beneath the grate.

The continuous cross wall 9, extending between the side Walls 8 of the generator, serves as a mounting or support for a plurality of fixed center grate bars 16, which extend across the center of the wall 9 at right angles thereto and terminate in oloseproximity to the inner faces of the segmental wall sections 7. Adjacent to the ii'xedgrate bars are four tilting grates 17, each pivoted at the center and adapted to discharge through the adjacent door. The pivoted gratos comprise grate bars 18, which extend in parallel relation with respect to the fixed grate bars and with respect to the side walls 8. The inner ends of the grate bars are in alinelnent with oneI another, but the outer ends of each of the center bars of the series are extended to conform to the configuration of the door openings.

In describing the construction of the movable grate sections, a single section only will -be described, in view of the fact that the same mechanism is employed in connection with each of the four movable grate sections. Each of the grate bars 18 is provided, at its inner end, with a depending hook 19, which embraces a supporting rod 20, which is supported above and in parallel relation with the of the center thereof. The Wall is provided,

ing brackets 21, through Which the supportmg rods are entered. The outer or free ends of the grate bars of the entire grate section uted through. the cross walls and discharged in the masonry of the surrounding generatop of the cross Wall 9 and slightly to one side at suitable intervals, with uinvardly extendare supported upon a yoke comprising a cross head 22 and side arms 23, each of which side arms is pivoted to a plate 24, which upwardly extends above the floor of the fire chamber. The metallic floor plates 13 serve as a foundation or support for a covering 25, of cement or similar imperviious subs-tance, which serves the further function of sealing the floor against the escape of air from the blast chamber save only through the perforated cross walls provided for the distribution of the blast. The outermost side arm of the yoke is provided with upper and lower socket lugs 2G and 27, which are suitably' l5 spaced to provide an intermediate socket ,space 2S, which preferably extends in diagonal relation with respect to the side arm of the yoke, which space provides for thc insertion of a suitable bar or other implement adapted to actuate the yoke. The lower lug 27 is provided with an inwardly extending foot 29, which, when the yoke has been thrown into the position shown in the right of Fig. 2, serves as a rest for the yoke. The

' 25 free ends of the movable grate bars, immediately outside of the cross head of the yoke, are provided, on their under faces, with eyes 30, in alinement with one another', which eyes are adapted to receive a transversely ex- 30 tending tie bar 3l, which serves to clamp together the free ends of the movable grate `bars and prevent their'displacement. In use the movable grate sections, when (raised, will occupy the position shown to the jl left of Fig. 2, in which position the movable fbars will be on a level with the fixed grate bars, so that the entire grate surface will be uniform. Vhen itis desired to tilt one or more of the grate sections .the operation can 40 be performed by insertingl a--bar or similar implement into the space affordedtherefor, thereafter throwing back the supporting yoke out of its raised position into its lowered position, as shown to the right of Fig. 2, which movement of the supporting yoke allows the free ends of the grate bars to fall by gravity, so that the surface of the lowered grate section will assume a sloping position and permit the ashes or refuse to slide out of the intended door, and this operation can be repeated on each of the grate sections which is adapted to discharge through its respective door, thereby permitting access to be had to any portion of the 'lire space of the generator structure.

The arrangement of the supporting cross walls is one which permits a perfect distribution of the blast and at the same time interferes in no way with the operation of the movable grate sec-tions, which facility of movement is rendered poss1ble by the cross formation of the cross walls. The device is one,wlnch 1s extremely simple m construcampie tion, and at the same time affords great con venience in the manipulating ofthe grate structure and permits access to any portion of the interior of the generator fire space.

l/Vhat l regard as new and desire tc secure by-Letters Patent isl.. The combination in a furnace structure, provided .with four doors, of a hollow cross wall provided with blast outlets, four movable rate sections hinged at their inner ends to t e supporting will and extending toward the respective doors, and means for supporting the free ends of the grate sections in raised position and adapted to permit lowering ofthe ends, substantially Ias described.

2. 'lhe combination in a furnace structure, provided with four doors, of a hollow cross wall provided with blast outlets, four movable grate sections hinO-ed at their inner ends tothe supporting wa and extendin toward the respective doors, and a ivote yoke for each of the gratesections orlsupporting the free end'thereof when raised, substantially as described.

3. In a furnace structure provided with four doors, the combination of a transversely extending hollow supporting wall, and a hollow cross wall at right angles thereto, the walls being provided with blast openings, four movable grate Sections, one for each of the doors, pivoted at their inner ends to the supporting wall and extending toward the respective doors, and means for supporting the free ends of the movable grate sections, substantially as described.

4. In a furnace structure provided with four doors, the combination of a transversel extending hollow sup orting wall, and a ho e low cross wall at rigllit angles thereto, the walls being provided with blast openings, four movable grate sections, one for each of the doors, pivoted at their inner ends to the supporting wall and extending toward the respective doors, and a pivoted yoke for supporting the free end of each of the grate Asections, substantially as described.

5. In a furnace structure provided with four doors, the combination of a transversely extending hollow sup orting wall, and a hollow cross wall at rig it angles thereto, the walls being provided with blast openings, four movable grate sections, one for each of the doors, pivoted at their inner ends to the supporting wall and extending toward the respective doors, a pivoted yoke for supporte ing the free end of each of the grate sections,

-and a plurality of fixed grate bars extending through the center of the furnace structure,

in alinement with the cross wall, substantially as described.

6. In combination with a cylindrical furnace structure provided ywith four doors, each of which is of inwardly diverging formation, a hollow supporting Wall open at its bottom and extending across the furnace and adapted to' be movedto advance posi- 10 structure intermediate of the doors, four tions to regulate the adjustment of the grate movable grate sections onel or each oi the sections, substantially as described. doors7 each of the grate sections consisting of i ALEXANDER CARSWELL.

a plurality of g'rate bars, a rod for each seo- Witnesses:

tion, to which the inner ends of the grate WALKER BANNING,

section 'near the free ends of the grate bars 4bars are hinged, and ay pivoted yoke for each l I OSCAR W. BOND. 

